1 // SPDX-License-Identifier: GPL-2.0+
2 /* Framework for finding and configuring PHYs.
3 * Also contains generic PHY driver
7 * Copyright (c) 2004 Freescale Semiconductor, Inc.
10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12 #include <linux/acpi.h>
13 #include <linux/bitmap.h>
14 #include <linux/delay.h>
15 #include <linux/errno.h>
16 #include <linux/etherdevice.h>
17 #include <linux/ethtool.h>
18 #include <linux/init.h>
19 #include <linux/interrupt.h>
21 #include <linux/kernel.h>
22 #include <linux/mdio.h>
23 #include <linux/mii.h>
25 #include <linux/module.h>
26 #include <linux/netdevice.h>
27 #include <linux/phy.h>
28 #include <linux/phy_led_triggers.h>
29 #include <linux/property.h>
30 #include <linux/sfp.h>
31 #include <linux/skbuff.h>
32 #include <linux/slab.h>
33 #include <linux/string.h>
34 #include <linux/uaccess.h>
35 #include <linux/unistd.h>
37 MODULE_DESCRIPTION("PHY library");
38 MODULE_AUTHOR("Andy Fleming");
39 MODULE_LICENSE("GPL");
41 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_features) __ro_after_init;
42 EXPORT_SYMBOL_GPL(phy_basic_features);
44 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_t1_features) __ro_after_init;
45 EXPORT_SYMBOL_GPL(phy_basic_t1_features);
47 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_features) __ro_after_init;
48 EXPORT_SYMBOL_GPL(phy_gbit_features);
50 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_fibre_features) __ro_after_init;
51 EXPORT_SYMBOL_GPL(phy_gbit_fibre_features);
53 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_all_ports_features) __ro_after_init;
54 EXPORT_SYMBOL_GPL(phy_gbit_all_ports_features);
56 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_features) __ro_after_init;
57 EXPORT_SYMBOL_GPL(phy_10gbit_features);
59 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_fec_features) __ro_after_init;
60 EXPORT_SYMBOL_GPL(phy_10gbit_fec_features);
62 const int phy_basic_ports_array[3] = {
63 ETHTOOL_LINK_MODE_Autoneg_BIT,
64 ETHTOOL_LINK_MODE_TP_BIT,
65 ETHTOOL_LINK_MODE_MII_BIT,
67 EXPORT_SYMBOL_GPL(phy_basic_ports_array);
69 const int phy_fibre_port_array[1] = {
70 ETHTOOL_LINK_MODE_FIBRE_BIT,
72 EXPORT_SYMBOL_GPL(phy_fibre_port_array);
74 const int phy_all_ports_features_array[7] = {
75 ETHTOOL_LINK_MODE_Autoneg_BIT,
76 ETHTOOL_LINK_MODE_TP_BIT,
77 ETHTOOL_LINK_MODE_MII_BIT,
78 ETHTOOL_LINK_MODE_FIBRE_BIT,
79 ETHTOOL_LINK_MODE_AUI_BIT,
80 ETHTOOL_LINK_MODE_BNC_BIT,
81 ETHTOOL_LINK_MODE_Backplane_BIT,
83 EXPORT_SYMBOL_GPL(phy_all_ports_features_array);
85 const int phy_10_100_features_array[4] = {
86 ETHTOOL_LINK_MODE_10baseT_Half_BIT,
87 ETHTOOL_LINK_MODE_10baseT_Full_BIT,
88 ETHTOOL_LINK_MODE_100baseT_Half_BIT,
89 ETHTOOL_LINK_MODE_100baseT_Full_BIT,
91 EXPORT_SYMBOL_GPL(phy_10_100_features_array);
93 const int phy_basic_t1_features_array[3] = {
94 ETHTOOL_LINK_MODE_TP_BIT,
95 ETHTOOL_LINK_MODE_10baseT1L_Full_BIT,
96 ETHTOOL_LINK_MODE_100baseT1_Full_BIT,
98 EXPORT_SYMBOL_GPL(phy_basic_t1_features_array);
100 const int phy_gbit_features_array[2] = {
101 ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
102 ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
104 EXPORT_SYMBOL_GPL(phy_gbit_features_array);
106 const int phy_10gbit_features_array[1] = {
107 ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
109 EXPORT_SYMBOL_GPL(phy_10gbit_features_array);
111 static const int phy_10gbit_fec_features_array[1] = {
112 ETHTOOL_LINK_MODE_10000baseR_FEC_BIT,
115 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_full_features) __ro_after_init;
116 EXPORT_SYMBOL_GPL(phy_10gbit_full_features);
118 static const int phy_10gbit_full_features_array[] = {
119 ETHTOOL_LINK_MODE_10baseT_Full_BIT,
120 ETHTOOL_LINK_MODE_100baseT_Full_BIT,
121 ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
122 ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
125 static void features_init(void)
127 /* 10/100 half/full*/
128 linkmode_set_bit_array(phy_basic_ports_array,
129 ARRAY_SIZE(phy_basic_ports_array),
131 linkmode_set_bit_array(phy_10_100_features_array,
132 ARRAY_SIZE(phy_10_100_features_array),
136 linkmode_set_bit_array(phy_basic_t1_features_array,
137 ARRAY_SIZE(phy_basic_t1_features_array),
138 phy_basic_t1_features);
140 /* 10/100 half/full + 1000 half/full */
141 linkmode_set_bit_array(phy_basic_ports_array,
142 ARRAY_SIZE(phy_basic_ports_array),
144 linkmode_set_bit_array(phy_10_100_features_array,
145 ARRAY_SIZE(phy_10_100_features_array),
147 linkmode_set_bit_array(phy_gbit_features_array,
148 ARRAY_SIZE(phy_gbit_features_array),
151 /* 10/100 half/full + 1000 half/full + fibre*/
152 linkmode_set_bit_array(phy_basic_ports_array,
153 ARRAY_SIZE(phy_basic_ports_array),
154 phy_gbit_fibre_features);
155 linkmode_set_bit_array(phy_10_100_features_array,
156 ARRAY_SIZE(phy_10_100_features_array),
157 phy_gbit_fibre_features);
158 linkmode_set_bit_array(phy_gbit_features_array,
159 ARRAY_SIZE(phy_gbit_features_array),
160 phy_gbit_fibre_features);
161 linkmode_set_bit_array(phy_fibre_port_array,
162 ARRAY_SIZE(phy_fibre_port_array),
163 phy_gbit_fibre_features);
165 /* 10/100 half/full + 1000 half/full + TP/MII/FIBRE/AUI/BNC/Backplane*/
166 linkmode_set_bit_array(phy_all_ports_features_array,
167 ARRAY_SIZE(phy_all_ports_features_array),
168 phy_gbit_all_ports_features);
169 linkmode_set_bit_array(phy_10_100_features_array,
170 ARRAY_SIZE(phy_10_100_features_array),
171 phy_gbit_all_ports_features);
172 linkmode_set_bit_array(phy_gbit_features_array,
173 ARRAY_SIZE(phy_gbit_features_array),
174 phy_gbit_all_ports_features);
176 /* 10/100 half/full + 1000 half/full + 10G full*/
177 linkmode_set_bit_array(phy_all_ports_features_array,
178 ARRAY_SIZE(phy_all_ports_features_array),
179 phy_10gbit_features);
180 linkmode_set_bit_array(phy_10_100_features_array,
181 ARRAY_SIZE(phy_10_100_features_array),
182 phy_10gbit_features);
183 linkmode_set_bit_array(phy_gbit_features_array,
184 ARRAY_SIZE(phy_gbit_features_array),
185 phy_10gbit_features);
186 linkmode_set_bit_array(phy_10gbit_features_array,
187 ARRAY_SIZE(phy_10gbit_features_array),
188 phy_10gbit_features);
190 /* 10/100/1000/10G full */
191 linkmode_set_bit_array(phy_all_ports_features_array,
192 ARRAY_SIZE(phy_all_ports_features_array),
193 phy_10gbit_full_features);
194 linkmode_set_bit_array(phy_10gbit_full_features_array,
195 ARRAY_SIZE(phy_10gbit_full_features_array),
196 phy_10gbit_full_features);
198 linkmode_set_bit_array(phy_10gbit_fec_features_array,
199 ARRAY_SIZE(phy_10gbit_fec_features_array),
200 phy_10gbit_fec_features);
203 void phy_device_free(struct phy_device *phydev)
205 put_device(&phydev->mdio.dev);
207 EXPORT_SYMBOL(phy_device_free);
209 static void phy_mdio_device_free(struct mdio_device *mdiodev)
211 struct phy_device *phydev;
213 phydev = container_of(mdiodev, struct phy_device, mdio);
214 phy_device_free(phydev);
217 static void phy_device_release(struct device *dev)
219 kfree(to_phy_device(dev));
222 static void phy_mdio_device_remove(struct mdio_device *mdiodev)
224 struct phy_device *phydev;
226 phydev = container_of(mdiodev, struct phy_device, mdio);
227 phy_device_remove(phydev);
230 static struct phy_driver genphy_driver;
232 static LIST_HEAD(phy_fixup_list);
233 static DEFINE_MUTEX(phy_fixup_lock);
235 static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
237 struct device_driver *drv = phydev->mdio.dev.driver;
238 struct phy_driver *phydrv = to_phy_driver(drv);
239 struct net_device *netdev = phydev->attached_dev;
241 if (!drv || !phydrv->suspend)
244 /* PHY not attached? May suspend if the PHY has not already been
245 * suspended as part of a prior call to phy_disconnect() ->
246 * phy_detach() -> phy_suspend() because the parent netdev might be the
247 * MDIO bus driver and clock gated at this point.
252 if (netdev->wol_enabled)
255 /* As long as not all affected network drivers support the
256 * wol_enabled flag, let's check for hints that WoL is enabled.
257 * Don't suspend PHY if the attached netdev parent may wake up.
258 * The parent may point to a PCI device, as in tg3 driver.
260 if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent))
263 /* Also don't suspend PHY if the netdev itself may wakeup. This
264 * is the case for devices w/o underlaying pwr. mgmt. aware bus,
267 if (device_may_wakeup(&netdev->dev))
271 return !phydev->suspended;
274 static __maybe_unused int mdio_bus_phy_suspend(struct device *dev)
276 struct phy_device *phydev = to_phy_device(dev);
278 if (phydev->mac_managed_pm)
281 /* Wakeup interrupts may occur during the system sleep transition when
282 * the PHY is inaccessible. Set flag to postpone handling until the PHY
283 * has resumed. Wait for concurrent interrupt handler to complete.
285 if (phy_interrupt_is_valid(phydev)) {
286 phydev->irq_suspended = 1;
287 synchronize_irq(phydev->irq);
290 /* We must stop the state machine manually, otherwise it stops out of
291 * control, possibly with the phydev->lock held. Upon resume, netdev
292 * may call phy routines that try to grab the same lock, and that may
293 * lead to a deadlock.
295 if (phydev->attached_dev && phydev->adjust_link)
296 phy_stop_machine(phydev);
298 if (!mdio_bus_phy_may_suspend(phydev))
301 phydev->suspended_by_mdio_bus = 1;
303 return phy_suspend(phydev);
306 static __maybe_unused int mdio_bus_phy_resume(struct device *dev)
308 struct phy_device *phydev = to_phy_device(dev);
311 if (phydev->mac_managed_pm)
314 if (!phydev->suspended_by_mdio_bus)
317 phydev->suspended_by_mdio_bus = 0;
319 ret = phy_init_hw(phydev);
323 ret = phy_resume(phydev);
327 if (phy_interrupt_is_valid(phydev)) {
328 phydev->irq_suspended = 0;
329 synchronize_irq(phydev->irq);
331 /* Rerun interrupts which were postponed by phy_interrupt()
332 * because they occurred during the system sleep transition.
334 if (phydev->irq_rerun) {
335 phydev->irq_rerun = 0;
336 enable_irq(phydev->irq);
337 irq_wake_thread(phydev->irq, phydev);
341 if (phydev->attached_dev && phydev->adjust_link)
342 phy_start_machine(phydev);
347 static SIMPLE_DEV_PM_OPS(mdio_bus_phy_pm_ops, mdio_bus_phy_suspend,
348 mdio_bus_phy_resume);
351 * phy_register_fixup - creates a new phy_fixup and adds it to the list
352 * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID)
353 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
354 * It can also be PHY_ANY_UID
355 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
357 * @run: The actual code to be run when a matching PHY is found
359 int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
360 int (*run)(struct phy_device *))
362 struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL);
367 strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id));
368 fixup->phy_uid = phy_uid;
369 fixup->phy_uid_mask = phy_uid_mask;
372 mutex_lock(&phy_fixup_lock);
373 list_add_tail(&fixup->list, &phy_fixup_list);
374 mutex_unlock(&phy_fixup_lock);
378 EXPORT_SYMBOL(phy_register_fixup);
380 /* Registers a fixup to be run on any PHY with the UID in phy_uid */
381 int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
382 int (*run)(struct phy_device *))
384 return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run);
386 EXPORT_SYMBOL(phy_register_fixup_for_uid);
388 /* Registers a fixup to be run on the PHY with id string bus_id */
389 int phy_register_fixup_for_id(const char *bus_id,
390 int (*run)(struct phy_device *))
392 return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run);
394 EXPORT_SYMBOL(phy_register_fixup_for_id);
397 * phy_unregister_fixup - remove a phy_fixup from the list
398 * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list
399 * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list
400 * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison
402 int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask)
404 struct list_head *pos, *n;
405 struct phy_fixup *fixup;
410 mutex_lock(&phy_fixup_lock);
411 list_for_each_safe(pos, n, &phy_fixup_list) {
412 fixup = list_entry(pos, struct phy_fixup, list);
414 if ((!strcmp(fixup->bus_id, bus_id)) &&
415 ((fixup->phy_uid & phy_uid_mask) ==
416 (phy_uid & phy_uid_mask))) {
417 list_del(&fixup->list);
423 mutex_unlock(&phy_fixup_lock);
427 EXPORT_SYMBOL(phy_unregister_fixup);
429 /* Unregisters a fixup of any PHY with the UID in phy_uid */
430 int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask)
432 return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask);
434 EXPORT_SYMBOL(phy_unregister_fixup_for_uid);
436 /* Unregisters a fixup of the PHY with id string bus_id */
437 int phy_unregister_fixup_for_id(const char *bus_id)
439 return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff);
441 EXPORT_SYMBOL(phy_unregister_fixup_for_id);
443 /* Returns 1 if fixup matches phydev in bus_id and phy_uid.
444 * Fixups can be set to match any in one or more fields.
446 static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup)
448 if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0)
449 if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0)
452 if ((fixup->phy_uid & fixup->phy_uid_mask) !=
453 (phydev->phy_id & fixup->phy_uid_mask))
454 if (fixup->phy_uid != PHY_ANY_UID)
460 /* Runs any matching fixups for this phydev */
461 static int phy_scan_fixups(struct phy_device *phydev)
463 struct phy_fixup *fixup;
465 mutex_lock(&phy_fixup_lock);
466 list_for_each_entry(fixup, &phy_fixup_list, list) {
467 if (phy_needs_fixup(phydev, fixup)) {
468 int err = fixup->run(phydev);
471 mutex_unlock(&phy_fixup_lock);
474 phydev->has_fixups = true;
477 mutex_unlock(&phy_fixup_lock);
482 static int phy_bus_match(struct device *dev, struct device_driver *drv)
484 struct phy_device *phydev = to_phy_device(dev);
485 struct phy_driver *phydrv = to_phy_driver(drv);
486 const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids);
489 if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY))
492 if (phydrv->match_phy_device)
493 return phydrv->match_phy_device(phydev);
495 if (phydev->is_c45) {
496 for (i = 1; i < num_ids; i++) {
497 if (phydev->c45_ids.device_ids[i] == 0xffffffff)
500 if ((phydrv->phy_id & phydrv->phy_id_mask) ==
501 (phydev->c45_ids.device_ids[i] &
502 phydrv->phy_id_mask))
507 return (phydrv->phy_id & phydrv->phy_id_mask) ==
508 (phydev->phy_id & phydrv->phy_id_mask);
513 phy_id_show(struct device *dev, struct device_attribute *attr, char *buf)
515 struct phy_device *phydev = to_phy_device(dev);
517 return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id);
519 static DEVICE_ATTR_RO(phy_id);
522 phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf)
524 struct phy_device *phydev = to_phy_device(dev);
525 const char *mode = NULL;
527 if (phy_is_internal(phydev))
530 mode = phy_modes(phydev->interface);
532 return sprintf(buf, "%s\n", mode);
534 static DEVICE_ATTR_RO(phy_interface);
537 phy_has_fixups_show(struct device *dev, struct device_attribute *attr,
540 struct phy_device *phydev = to_phy_device(dev);
542 return sprintf(buf, "%d\n", phydev->has_fixups);
544 static DEVICE_ATTR_RO(phy_has_fixups);
546 static ssize_t phy_dev_flags_show(struct device *dev,
547 struct device_attribute *attr,
550 struct phy_device *phydev = to_phy_device(dev);
552 return sprintf(buf, "0x%08x\n", phydev->dev_flags);
554 static DEVICE_ATTR_RO(phy_dev_flags);
556 static struct attribute *phy_dev_attrs[] = {
557 &dev_attr_phy_id.attr,
558 &dev_attr_phy_interface.attr,
559 &dev_attr_phy_has_fixups.attr,
560 &dev_attr_phy_dev_flags.attr,
563 ATTRIBUTE_GROUPS(phy_dev);
565 static const struct device_type mdio_bus_phy_type = {
567 .groups = phy_dev_groups,
568 .release = phy_device_release,
569 .pm = pm_ptr(&mdio_bus_phy_pm_ops),
572 static int phy_request_driver_module(struct phy_device *dev, u32 phy_id)
576 ret = request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT,
577 MDIO_ID_ARGS(phy_id));
578 /* We only check for failures in executing the usermode binary,
579 * not whether a PHY driver module exists for the PHY ID.
580 * Accept -ENOENT because this may occur in case no initramfs exists,
581 * then modprobe isn't available.
583 if (IS_ENABLED(CONFIG_MODULES) && ret < 0 && ret != -ENOENT) {
584 phydev_err(dev, "error %d loading PHY driver module for ID 0x%08lx\n",
585 ret, (unsigned long)phy_id);
592 struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id,
594 struct phy_c45_device_ids *c45_ids)
596 struct phy_device *dev;
597 struct mdio_device *mdiodev;
600 /* We allocate the device, and initialize the default values */
601 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
603 return ERR_PTR(-ENOMEM);
605 mdiodev = &dev->mdio;
606 mdiodev->dev.parent = &bus->dev;
607 mdiodev->dev.bus = &mdio_bus_type;
608 mdiodev->dev.type = &mdio_bus_phy_type;
610 mdiodev->bus_match = phy_bus_match;
611 mdiodev->addr = addr;
612 mdiodev->flags = MDIO_DEVICE_FLAG_PHY;
613 mdiodev->device_free = phy_mdio_device_free;
614 mdiodev->device_remove = phy_mdio_device_remove;
616 dev->speed = SPEED_UNKNOWN;
617 dev->duplex = DUPLEX_UNKNOWN;
622 dev->interface = PHY_INTERFACE_MODE_GMII;
624 dev->autoneg = AUTONEG_ENABLE;
626 dev->pma_extable = -ENODATA;
627 dev->is_c45 = is_c45;
628 dev->phy_id = phy_id;
630 dev->c45_ids = *c45_ids;
631 dev->irq = bus->irq[addr];
633 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr);
634 device_initialize(&mdiodev->dev);
636 dev->state = PHY_DOWN;
638 mutex_init(&dev->lock);
639 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
641 /* Request the appropriate module unconditionally; don't
642 * bother trying to do so only if it isn't already loaded,
643 * because that gets complicated. A hotplug event would have
644 * done an unconditional modprobe anyway.
645 * We don't do normal hotplug because it won't work for MDIO
646 * -- because it relies on the device staying around for long
647 * enough for the driver to get loaded. With MDIO, the NIC
648 * driver will get bored and give up as soon as it finds that
649 * there's no driver _already_ loaded.
651 if (is_c45 && c45_ids) {
652 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
655 for (i = 1; i < num_ids; i++) {
656 if (c45_ids->device_ids[i] == 0xffffffff)
659 ret = phy_request_driver_module(dev,
660 c45_ids->device_ids[i]);
665 ret = phy_request_driver_module(dev, phy_id);
669 put_device(&mdiodev->dev);
675 EXPORT_SYMBOL(phy_device_create);
677 /* phy_c45_probe_present - checks to see if a MMD is present in the package
678 * @bus: the target MII bus
679 * @prtad: PHY package address on the MII bus
680 * @devad: PHY device (MMD) address
682 * Read the MDIO_STAT2 register, and check whether a device is responding
685 * Returns: negative error number on bus access error, zero if no device
686 * is responding, or positive if a device is present.
688 static int phy_c45_probe_present(struct mii_bus *bus, int prtad, int devad)
692 stat2 = mdiobus_c45_read(bus, prtad, devad, MDIO_STAT2);
696 return (stat2 & MDIO_STAT2_DEVPRST) == MDIO_STAT2_DEVPRST_VAL;
699 /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers.
700 * @bus: the target MII bus
701 * @addr: PHY address on the MII bus
702 * @dev_addr: MMD address in the PHY.
703 * @devices_in_package: where to store the devices in package information.
705 * Description: reads devices in package registers of a MMD at @dev_addr
706 * from PHY at @addr on @bus.
708 * Returns: 0 on success, -EIO on failure.
710 static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
711 u32 *devices_in_package)
715 phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS2);
718 *devices_in_package = phy_reg << 16;
720 phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS1);
723 *devices_in_package |= phy_reg;
729 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
730 * @bus: the target MII bus
731 * @addr: PHY address on the MII bus
732 * @c45_ids: where to store the c45 ID information.
734 * Read the PHY "devices in package". If this appears to be valid, read
735 * the PHY identifiers for each device. Return the "devices in package"
736 * and identifiers in @c45_ids.
738 * Returns zero on success, %-EIO on bus access error, or %-ENODEV if
739 * the "devices in package" is invalid.
741 static int get_phy_c45_ids(struct mii_bus *bus, int addr,
742 struct phy_c45_device_ids *c45_ids)
744 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
748 /* Find first non-zero Devices In package. Device zero is reserved
749 * for 802.3 c45 complied PHYs, so don't probe it at first.
751 for (i = 1; i < MDIO_MMD_NUM && (devs_in_pkg == 0 ||
752 (devs_in_pkg & 0x1fffffff) == 0x1fffffff); i++) {
753 if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) {
754 /* Check that there is a device present at this
755 * address before reading the devices-in-package
756 * register to avoid reading garbage from the PHY.
757 * Some PHYs (88x3310) vendor space is not IEEE802.3
760 ret = phy_c45_probe_present(bus, addr, i);
767 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, &devs_in_pkg);
772 if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff) {
773 /* If mostly Fs, there is no device there, then let's probe
774 * MMD 0, as some 10G PHYs have zero Devices In package,
775 * e.g. Cortina CS4315/CS4340 PHY.
777 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, &devs_in_pkg);
781 /* no device there, let's get out of here */
782 if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff)
786 /* Now probe Device Identifiers for each device present. */
787 for (i = 1; i < num_ids; i++) {
788 if (!(devs_in_pkg & (1 << i)))
791 if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) {
792 /* Probe the "Device Present" bits for the vendor MMDs
793 * to ignore these if they do not contain IEEE 802.3
796 ret = phy_c45_probe_present(bus, addr, i);
804 phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID1);
807 c45_ids->device_ids[i] = phy_reg << 16;
809 phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID2);
812 c45_ids->device_ids[i] |= phy_reg;
815 c45_ids->devices_in_package = devs_in_pkg;
816 /* Bit 0 doesn't represent a device, it indicates c22 regs presence */
817 c45_ids->mmds_present = devs_in_pkg & ~BIT(0);
823 * get_phy_c22_id - reads the specified addr for its clause 22 ID.
824 * @bus: the target MII bus
825 * @addr: PHY address on the MII bus
826 * @phy_id: where to store the ID retrieved.
828 * Read the 802.3 clause 22 PHY ID from the PHY at @addr on the @bus,
829 * placing it in @phy_id. Return zero on successful read and the ID is
830 * valid, %-EIO on bus access error, or %-ENODEV if no device responds
833 static int get_phy_c22_id(struct mii_bus *bus, int addr, u32 *phy_id)
837 /* Grab the bits from PHYIR1, and put them in the upper half */
838 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
840 /* returning -ENODEV doesn't stop bus scanning */
841 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO;
844 *phy_id = phy_reg << 16;
846 /* Grab the bits from PHYIR2, and put them in the lower half */
847 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2);
849 /* returning -ENODEV doesn't stop bus scanning */
850 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO;
855 /* If the phy_id is mostly Fs, there is no device there */
856 if ((*phy_id & 0x1fffffff) == 0x1fffffff)
862 /* Extract the phy ID from the compatible string of the form
863 * ethernet-phy-idAAAA.BBBB.
865 int fwnode_get_phy_id(struct fwnode_handle *fwnode, u32 *phy_id)
867 unsigned int upper, lower;
871 ret = fwnode_property_read_string(fwnode, "compatible", &cp);
875 if (sscanf(cp, "ethernet-phy-id%4x.%4x", &upper, &lower) != 2)
878 *phy_id = ((upper & GENMASK(15, 0)) << 16) | (lower & GENMASK(15, 0));
881 EXPORT_SYMBOL(fwnode_get_phy_id);
884 * get_phy_device - reads the specified PHY device and returns its @phy_device
886 * @bus: the target MII bus
887 * @addr: PHY address on the MII bus
888 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
890 * Probe for a PHY at @addr on @bus.
892 * When probing for a clause 22 PHY, then read the ID registers. If we find
893 * a valid ID, allocate and return a &struct phy_device.
895 * When probing for a clause 45 PHY, read the "devices in package" registers.
896 * If the "devices in package" appears valid, read the ID registers for each
897 * MMD, allocate and return a &struct phy_device.
899 * Returns an allocated &struct phy_device on success, %-ENODEV if there is
900 * no PHY present, or %-EIO on bus access error.
902 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
904 struct phy_c45_device_ids c45_ids;
908 c45_ids.devices_in_package = 0;
909 c45_ids.mmds_present = 0;
910 memset(c45_ids.device_ids, 0xff, sizeof(c45_ids.device_ids));
913 r = get_phy_c45_ids(bus, addr, &c45_ids);
915 r = get_phy_c22_id(bus, addr, &phy_id);
920 /* PHY device such as the Marvell Alaska 88E2110 will return a PHY ID
921 * of 0 when probed using get_phy_c22_id() with no error. Proceed to
922 * probe with C45 to see if we're able to get a valid PHY ID in the C45
923 * space, if successful, create the C45 PHY device.
925 if (!is_c45 && phy_id == 0 && bus->probe_capabilities >= MDIOBUS_C45) {
926 r = get_phy_c45_ids(bus, addr, &c45_ids);
928 return phy_device_create(bus, addr, phy_id,
932 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids);
934 EXPORT_SYMBOL(get_phy_device);
937 * phy_device_register - Register the phy device on the MDIO bus
938 * @phydev: phy_device structure to be added to the MDIO bus
940 int phy_device_register(struct phy_device *phydev)
944 err = mdiobus_register_device(&phydev->mdio);
948 /* Deassert the reset signal */
949 phy_device_reset(phydev, 0);
951 /* Run all of the fixups for this PHY */
952 err = phy_scan_fixups(phydev);
954 phydev_err(phydev, "failed to initialize\n");
958 err = device_add(&phydev->mdio.dev);
960 phydev_err(phydev, "failed to add\n");
967 /* Assert the reset signal */
968 phy_device_reset(phydev, 1);
970 mdiobus_unregister_device(&phydev->mdio);
973 EXPORT_SYMBOL(phy_device_register);
976 * phy_device_remove - Remove a previously registered phy device from the MDIO bus
977 * @phydev: phy_device structure to remove
979 * This doesn't free the phy_device itself, it merely reverses the effects
980 * of phy_device_register(). Use phy_device_free() to free the device
981 * after calling this function.
983 void phy_device_remove(struct phy_device *phydev)
985 unregister_mii_timestamper(phydev->mii_ts);
987 device_del(&phydev->mdio.dev);
989 /* Assert the reset signal */
990 phy_device_reset(phydev, 1);
992 mdiobus_unregister_device(&phydev->mdio);
994 EXPORT_SYMBOL(phy_device_remove);
997 * phy_get_c45_ids - Read 802.3-c45 IDs for phy device.
998 * @phydev: phy_device structure to read 802.3-c45 IDs
1000 * Returns zero on success, %-EIO on bus access error, or %-ENODEV if
1001 * the "devices in package" is invalid.
1003 int phy_get_c45_ids(struct phy_device *phydev)
1005 return get_phy_c45_ids(phydev->mdio.bus, phydev->mdio.addr,
1008 EXPORT_SYMBOL(phy_get_c45_ids);
1011 * phy_find_first - finds the first PHY device on the bus
1012 * @bus: the target MII bus
1014 struct phy_device *phy_find_first(struct mii_bus *bus)
1016 struct phy_device *phydev;
1019 for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
1020 phydev = mdiobus_get_phy(bus, addr);
1026 EXPORT_SYMBOL(phy_find_first);
1028 static void phy_link_change(struct phy_device *phydev, bool up)
1030 struct net_device *netdev = phydev->attached_dev;
1033 netif_carrier_on(netdev);
1035 netif_carrier_off(netdev);
1036 phydev->adjust_link(netdev);
1037 if (phydev->mii_ts && phydev->mii_ts->link_state)
1038 phydev->mii_ts->link_state(phydev->mii_ts, phydev);
1042 * phy_prepare_link - prepares the PHY layer to monitor link status
1043 * @phydev: target phy_device struct
1044 * @handler: callback function for link status change notifications
1046 * Description: Tells the PHY infrastructure to handle the
1047 * gory details on monitoring link status (whether through
1048 * polling or an interrupt), and to call back to the
1049 * connected device driver when the link status changes.
1050 * If you want to monitor your own link state, don't call
1053 static void phy_prepare_link(struct phy_device *phydev,
1054 void (*handler)(struct net_device *))
1056 phydev->adjust_link = handler;
1060 * phy_connect_direct - connect an ethernet device to a specific phy_device
1061 * @dev: the network device to connect
1062 * @phydev: the pointer to the phy device
1063 * @handler: callback function for state change notifications
1064 * @interface: PHY device's interface
1066 int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
1067 void (*handler)(struct net_device *),
1068 phy_interface_t interface)
1075 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1079 phy_prepare_link(phydev, handler);
1080 if (phy_interrupt_is_valid(phydev))
1081 phy_request_interrupt(phydev);
1085 EXPORT_SYMBOL(phy_connect_direct);
1088 * phy_connect - connect an ethernet device to a PHY device
1089 * @dev: the network device to connect
1090 * @bus_id: the id string of the PHY device to connect
1091 * @handler: callback function for state change notifications
1092 * @interface: PHY device's interface
1094 * Description: Convenience function for connecting ethernet
1095 * devices to PHY devices. The default behavior is for
1096 * the PHY infrastructure to handle everything, and only notify
1097 * the connected driver when the link status changes. If you
1098 * don't want, or can't use the provided functionality, you may
1099 * choose to call only the subset of functions which provide
1100 * the desired functionality.
1102 struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
1103 void (*handler)(struct net_device *),
1104 phy_interface_t interface)
1106 struct phy_device *phydev;
1110 /* Search the list of PHY devices on the mdio bus for the
1111 * PHY with the requested name
1113 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
1115 pr_err("PHY %s not found\n", bus_id);
1116 return ERR_PTR(-ENODEV);
1118 phydev = to_phy_device(d);
1120 rc = phy_connect_direct(dev, phydev, handler, interface);
1127 EXPORT_SYMBOL(phy_connect);
1130 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY
1132 * @phydev: target phy_device struct
1134 void phy_disconnect(struct phy_device *phydev)
1136 if (phy_is_started(phydev))
1139 if (phy_interrupt_is_valid(phydev))
1140 phy_free_interrupt(phydev);
1142 phydev->adjust_link = NULL;
1146 EXPORT_SYMBOL(phy_disconnect);
1149 * phy_poll_reset - Safely wait until a PHY reset has properly completed
1150 * @phydev: The PHY device to poll
1152 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as
1153 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR
1154 * register must be polled until the BMCR_RESET bit clears.
1156 * Furthermore, any attempts to write to PHY registers may have no effect
1157 * or even generate MDIO bus errors until this is complete.
1159 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the
1160 * standard and do not fully reset after the BMCR_RESET bit is set, and may
1161 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an
1162 * effort to support such broken PHYs, this function is separate from the
1163 * standard phy_init_hw() which will zero all the other bits in the BMCR
1164 * and reapply all driver-specific and board-specific fixups.
1166 static int phy_poll_reset(struct phy_device *phydev)
1168 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
1171 ret = phy_read_poll_timeout(phydev, MII_BMCR, val, !(val & BMCR_RESET),
1172 50000, 600000, true);
1175 /* Some chips (smsc911x) may still need up to another 1ms after the
1176 * BMCR_RESET bit is cleared before they are usable.
1182 int phy_init_hw(struct phy_device *phydev)
1186 /* Deassert the reset signal */
1187 phy_device_reset(phydev, 0);
1192 if (phydev->drv->soft_reset) {
1193 ret = phydev->drv->soft_reset(phydev);
1194 /* see comment in genphy_soft_reset for an explanation */
1196 phydev->suspended = 0;
1202 ret = phy_scan_fixups(phydev);
1206 if (phydev->drv->config_init) {
1207 ret = phydev->drv->config_init(phydev);
1212 if (phydev->drv->config_intr) {
1213 ret = phydev->drv->config_intr(phydev);
1220 EXPORT_SYMBOL(phy_init_hw);
1222 void phy_attached_info(struct phy_device *phydev)
1224 phy_attached_print(phydev, NULL);
1226 EXPORT_SYMBOL(phy_attached_info);
1228 #define ATTACHED_FMT "attached PHY driver %s(mii_bus:phy_addr=%s, irq=%s)"
1229 char *phy_attached_info_irq(struct phy_device *phydev)
1234 switch(phydev->irq) {
1238 case PHY_MAC_INTERRUPT:
1242 snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq);
1247 return kasprintf(GFP_KERNEL, "%s", irq_str);
1249 EXPORT_SYMBOL(phy_attached_info_irq);
1251 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
1253 const char *unbound = phydev->drv ? "" : "[unbound] ";
1254 char *irq_str = phy_attached_info_irq(phydev);
1257 phydev_info(phydev, ATTACHED_FMT "\n", unbound,
1258 phydev_name(phydev), irq_str);
1262 phydev_info(phydev, ATTACHED_FMT, unbound,
1263 phydev_name(phydev), irq_str);
1271 EXPORT_SYMBOL(phy_attached_print);
1273 static void phy_sysfs_create_links(struct phy_device *phydev)
1275 struct net_device *dev = phydev->attached_dev;
1281 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj,
1286 err = sysfs_create_link_nowarn(&dev->dev.kobj,
1287 &phydev->mdio.dev.kobj,
1290 dev_err(&dev->dev, "could not add device link to %s err %d\n",
1291 kobject_name(&phydev->mdio.dev.kobj),
1293 /* non-fatal - some net drivers can use one netdevice
1294 * with more then one phy
1298 phydev->sysfs_links = true;
1302 phy_standalone_show(struct device *dev, struct device_attribute *attr,
1305 struct phy_device *phydev = to_phy_device(dev);
1307 return sprintf(buf, "%d\n", !phydev->attached_dev);
1309 static DEVICE_ATTR_RO(phy_standalone);
1312 * phy_sfp_attach - attach the SFP bus to the PHY upstream network device
1313 * @upstream: pointer to the phy device
1314 * @bus: sfp bus representing cage being attached
1316 * This is used to fill in the sfp_upstream_ops .attach member.
1318 void phy_sfp_attach(void *upstream, struct sfp_bus *bus)
1320 struct phy_device *phydev = upstream;
1322 if (phydev->attached_dev)
1323 phydev->attached_dev->sfp_bus = bus;
1324 phydev->sfp_bus_attached = true;
1326 EXPORT_SYMBOL(phy_sfp_attach);
1329 * phy_sfp_detach - detach the SFP bus from the PHY upstream network device
1330 * @upstream: pointer to the phy device
1331 * @bus: sfp bus representing cage being attached
1333 * This is used to fill in the sfp_upstream_ops .detach member.
1335 void phy_sfp_detach(void *upstream, struct sfp_bus *bus)
1337 struct phy_device *phydev = upstream;
1339 if (phydev->attached_dev)
1340 phydev->attached_dev->sfp_bus = NULL;
1341 phydev->sfp_bus_attached = false;
1343 EXPORT_SYMBOL(phy_sfp_detach);
1346 * phy_sfp_probe - probe for a SFP cage attached to this PHY device
1347 * @phydev: Pointer to phy_device
1348 * @ops: SFP's upstream operations
1350 int phy_sfp_probe(struct phy_device *phydev,
1351 const struct sfp_upstream_ops *ops)
1353 struct sfp_bus *bus;
1356 if (phydev->mdio.dev.fwnode) {
1357 bus = sfp_bus_find_fwnode(phydev->mdio.dev.fwnode);
1359 return PTR_ERR(bus);
1361 phydev->sfp_bus = bus;
1363 ret = sfp_bus_add_upstream(bus, phydev, ops);
1368 EXPORT_SYMBOL(phy_sfp_probe);
1371 * phy_attach_direct - attach a network device to a given PHY device pointer
1372 * @dev: network device to attach
1373 * @phydev: Pointer to phy_device to attach
1374 * @flags: PHY device's dev_flags
1375 * @interface: PHY device's interface
1377 * Description: Called by drivers to attach to a particular PHY
1378 * device. The phy_device is found, and properly hooked up
1379 * to the phy_driver. If no driver is attached, then a
1380 * generic driver is used. The phy_device is given a ptr to
1381 * the attaching device, and given a callback for link status
1382 * change. The phy_device is returned to the attaching driver.
1383 * This function takes a reference on the phy device.
1385 int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
1386 u32 flags, phy_interface_t interface)
1388 struct mii_bus *bus = phydev->mdio.bus;
1389 struct device *d = &phydev->mdio.dev;
1390 struct module *ndev_owner = NULL;
1391 bool using_genphy = false;
1394 /* For Ethernet device drivers that register their own MDIO bus, we
1395 * will have bus->owner match ndev_mod, so we do not want to increment
1396 * our own module->refcnt here, otherwise we would not be able to
1400 ndev_owner = dev->dev.parent->driver->owner;
1401 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) {
1402 phydev_err(phydev, "failed to get the bus module\n");
1408 /* Assume that if there is no driver, that it doesn't
1409 * exist, and we should use the genphy driver.
1413 d->driver = &genphy_c45_driver.mdiodrv.driver;
1415 d->driver = &genphy_driver.mdiodrv.driver;
1417 using_genphy = true;
1420 if (!try_module_get(d->driver->owner)) {
1421 phydev_err(phydev, "failed to get the device driver module\n");
1423 goto error_put_device;
1427 err = d->driver->probe(d);
1429 err = device_bind_driver(d);
1432 goto error_module_put;
1435 if (phydev->attached_dev) {
1436 dev_err(&dev->dev, "PHY already attached\n");
1441 phydev->phy_link_change = phy_link_change;
1443 phydev->attached_dev = dev;
1444 dev->phydev = phydev;
1446 if (phydev->sfp_bus_attached)
1447 dev->sfp_bus = phydev->sfp_bus;
1448 else if (dev->sfp_bus)
1449 phydev->is_on_sfp_module = true;
1452 /* Some Ethernet drivers try to connect to a PHY device before
1453 * calling register_netdevice() -> netdev_register_kobject() and
1454 * does the dev->dev.kobj initialization. Here we only check for
1455 * success which indicates that the network device kobject is
1456 * ready. Once we do that we still need to keep track of whether
1457 * links were successfully set up or not for phy_detach() to
1458 * remove them accordingly.
1460 phydev->sysfs_links = false;
1462 phy_sysfs_create_links(phydev);
1464 if (!phydev->attached_dev) {
1465 err = sysfs_create_file(&phydev->mdio.dev.kobj,
1466 &dev_attr_phy_standalone.attr);
1468 phydev_err(phydev, "error creating 'phy_standalone' sysfs entry\n");
1471 phydev->dev_flags |= flags;
1473 phydev->interface = interface;
1475 phydev->state = PHY_READY;
1477 phydev->interrupts = PHY_INTERRUPT_DISABLED;
1479 /* Port is set to PORT_TP by default and the actual PHY driver will set
1480 * it to different value depending on the PHY configuration. If we have
1481 * the generic PHY driver we can't figure it out, thus set the old
1482 * legacy PORT_MII value.
1485 phydev->port = PORT_MII;
1487 /* Initial carrier state is off as the phy is about to be
1491 netif_carrier_off(phydev->attached_dev);
1493 /* Do initial configuration here, now that
1494 * we have certain key parameters
1495 * (dev_flags and interface)
1497 err = phy_init_hw(phydev);
1502 phy_led_triggers_register(phydev);
1507 /* phy_detach() does all of the cleanup below */
1512 module_put(d->driver->owner);
1515 if (ndev_owner != bus->owner)
1516 module_put(bus->owner);
1519 EXPORT_SYMBOL(phy_attach_direct);
1522 * phy_attach - attach a network device to a particular PHY device
1523 * @dev: network device to attach
1524 * @bus_id: Bus ID of PHY device to attach
1525 * @interface: PHY device's interface
1527 * Description: Same as phy_attach_direct() except that a PHY bus_id
1528 * string is passed instead of a pointer to a struct phy_device.
1530 struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
1531 phy_interface_t interface)
1533 struct bus_type *bus = &mdio_bus_type;
1534 struct phy_device *phydev;
1539 return ERR_PTR(-EINVAL);
1541 /* Search the list of PHY devices on the mdio bus for the
1542 * PHY with the requested name
1544 d = bus_find_device_by_name(bus, NULL, bus_id);
1546 pr_err("PHY %s not found\n", bus_id);
1547 return ERR_PTR(-ENODEV);
1549 phydev = to_phy_device(d);
1551 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1558 EXPORT_SYMBOL(phy_attach);
1560 static bool phy_driver_is_genphy_kind(struct phy_device *phydev,
1561 struct device_driver *driver)
1563 struct device *d = &phydev->mdio.dev;
1570 ret = d->driver == driver;
1576 bool phy_driver_is_genphy(struct phy_device *phydev)
1578 return phy_driver_is_genphy_kind(phydev,
1579 &genphy_driver.mdiodrv.driver);
1581 EXPORT_SYMBOL_GPL(phy_driver_is_genphy);
1583 bool phy_driver_is_genphy_10g(struct phy_device *phydev)
1585 return phy_driver_is_genphy_kind(phydev,
1586 &genphy_c45_driver.mdiodrv.driver);
1588 EXPORT_SYMBOL_GPL(phy_driver_is_genphy_10g);
1591 * phy_package_join - join a common PHY group
1592 * @phydev: target phy_device struct
1593 * @addr: cookie and PHY address for global register access
1594 * @priv_size: if non-zero allocate this amount of bytes for private data
1596 * This joins a PHY group and provides a shared storage for all phydevs in
1597 * this group. This is intended to be used for packages which contain
1598 * more than one PHY, for example a quad PHY transceiver.
1600 * The addr parameter serves as a cookie which has to have the same value
1601 * for all members of one group and as a PHY address to access generic
1602 * registers of a PHY package. Usually, one of the PHY addresses of the
1603 * different PHYs in the package provides access to these global registers.
1604 * The address which is given here, will be used in the phy_package_read()
1605 * and phy_package_write() convenience functions. If your PHY doesn't have
1606 * global registers you can just pick any of the PHY addresses.
1608 * This will set the shared pointer of the phydev to the shared storage.
1609 * If this is the first call for a this cookie the shared storage will be
1610 * allocated. If priv_size is non-zero, the given amount of bytes are
1611 * allocated for the priv member.
1613 * Returns < 1 on error, 0 on success. Esp. calling phy_package_join()
1614 * with the same cookie but a different priv_size is an error.
1616 int phy_package_join(struct phy_device *phydev, int addr, size_t priv_size)
1618 struct mii_bus *bus = phydev->mdio.bus;
1619 struct phy_package_shared *shared;
1622 if (addr < 0 || addr >= PHY_MAX_ADDR)
1625 mutex_lock(&bus->shared_lock);
1626 shared = bus->shared[addr];
1629 shared = kzalloc(sizeof(*shared), GFP_KERNEL);
1633 shared->priv = kzalloc(priv_size, GFP_KERNEL);
1636 shared->priv_size = priv_size;
1638 shared->addr = addr;
1639 refcount_set(&shared->refcnt, 1);
1640 bus->shared[addr] = shared;
1643 if (priv_size && priv_size != shared->priv_size)
1645 refcount_inc(&shared->refcnt);
1647 mutex_unlock(&bus->shared_lock);
1649 phydev->shared = shared;
1656 mutex_unlock(&bus->shared_lock);
1659 EXPORT_SYMBOL_GPL(phy_package_join);
1662 * phy_package_leave - leave a common PHY group
1663 * @phydev: target phy_device struct
1665 * This leaves a PHY group created by phy_package_join(). If this phydev
1666 * was the last user of the shared data between the group, this data is
1667 * freed. Resets the phydev->shared pointer to NULL.
1669 void phy_package_leave(struct phy_device *phydev)
1671 struct phy_package_shared *shared = phydev->shared;
1672 struct mii_bus *bus = phydev->mdio.bus;
1677 if (refcount_dec_and_mutex_lock(&shared->refcnt, &bus->shared_lock)) {
1678 bus->shared[shared->addr] = NULL;
1679 mutex_unlock(&bus->shared_lock);
1680 kfree(shared->priv);
1684 phydev->shared = NULL;
1686 EXPORT_SYMBOL_GPL(phy_package_leave);
1688 static void devm_phy_package_leave(struct device *dev, void *res)
1690 phy_package_leave(*(struct phy_device **)res);
1694 * devm_phy_package_join - resource managed phy_package_join()
1695 * @dev: device that is registering this PHY package
1696 * @phydev: target phy_device struct
1697 * @addr: cookie and PHY address for global register access
1698 * @priv_size: if non-zero allocate this amount of bytes for private data
1700 * Managed phy_package_join(). Shared storage fetched by this function,
1701 * phy_package_leave() is automatically called on driver detach. See
1702 * phy_package_join() for more information.
1704 int devm_phy_package_join(struct device *dev, struct phy_device *phydev,
1705 int addr, size_t priv_size)
1707 struct phy_device **ptr;
1710 ptr = devres_alloc(devm_phy_package_leave, sizeof(*ptr),
1715 ret = phy_package_join(phydev, addr, priv_size);
1719 devres_add(dev, ptr);
1726 EXPORT_SYMBOL_GPL(devm_phy_package_join);
1729 * phy_detach - detach a PHY device from its network device
1730 * @phydev: target phy_device struct
1732 * This detaches the phy device from its network device and the phy
1733 * driver, and drops the reference count taken in phy_attach_direct().
1735 void phy_detach(struct phy_device *phydev)
1737 struct net_device *dev = phydev->attached_dev;
1738 struct module *ndev_owner = NULL;
1739 struct mii_bus *bus;
1741 if (phydev->sysfs_links) {
1743 sysfs_remove_link(&dev->dev.kobj, "phydev");
1744 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev");
1747 if (!phydev->attached_dev)
1748 sysfs_remove_file(&phydev->mdio.dev.kobj,
1749 &dev_attr_phy_standalone.attr);
1751 phy_suspend(phydev);
1753 phydev->attached_dev->phydev = NULL;
1754 phydev->attached_dev = NULL;
1756 phydev->phylink = NULL;
1758 phy_led_triggers_unregister(phydev);
1760 if (phydev->mdio.dev.driver)
1761 module_put(phydev->mdio.dev.driver->owner);
1763 /* If the device had no specific driver before (i.e. - it
1764 * was using the generic driver), we unbind the device
1765 * from the generic driver so that there's a chance a
1766 * real driver could be loaded
1768 if (phy_driver_is_genphy(phydev) ||
1769 phy_driver_is_genphy_10g(phydev))
1770 device_release_driver(&phydev->mdio.dev);
1772 /* Assert the reset signal */
1773 phy_device_reset(phydev, 1);
1776 * The phydev might go away on the put_device() below, so avoid
1777 * a use-after-free bug by reading the underlying bus first.
1779 bus = phydev->mdio.bus;
1781 put_device(&phydev->mdio.dev);
1783 ndev_owner = dev->dev.parent->driver->owner;
1784 if (ndev_owner != bus->owner)
1785 module_put(bus->owner);
1787 EXPORT_SYMBOL(phy_detach);
1789 int phy_suspend(struct phy_device *phydev)
1791 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1792 struct net_device *netdev = phydev->attached_dev;
1793 struct phy_driver *phydrv = phydev->drv;
1796 if (phydev->suspended)
1799 /* If the device has WOL enabled, we cannot suspend the PHY */
1800 phy_ethtool_get_wol(phydev, &wol);
1801 if (wol.wolopts || (netdev && netdev->wol_enabled))
1804 if (!phydrv || !phydrv->suspend)
1807 ret = phydrv->suspend(phydev);
1809 phydev->suspended = true;
1813 EXPORT_SYMBOL(phy_suspend);
1815 int __phy_resume(struct phy_device *phydev)
1817 struct phy_driver *phydrv = phydev->drv;
1820 lockdep_assert_held(&phydev->lock);
1822 if (!phydrv || !phydrv->resume)
1825 ret = phydrv->resume(phydev);
1827 phydev->suspended = false;
1831 EXPORT_SYMBOL(__phy_resume);
1833 int phy_resume(struct phy_device *phydev)
1837 mutex_lock(&phydev->lock);
1838 ret = __phy_resume(phydev);
1839 mutex_unlock(&phydev->lock);
1843 EXPORT_SYMBOL(phy_resume);
1845 int phy_loopback(struct phy_device *phydev, bool enable)
1852 mutex_lock(&phydev->lock);
1854 if (enable && phydev->loopback_enabled) {
1859 if (!enable && !phydev->loopback_enabled) {
1864 if (phydev->drv->set_loopback)
1865 ret = phydev->drv->set_loopback(phydev, enable);
1867 ret = genphy_loopback(phydev, enable);
1872 phydev->loopback_enabled = enable;
1875 mutex_unlock(&phydev->lock);
1878 EXPORT_SYMBOL(phy_loopback);
1881 * phy_reset_after_clk_enable - perform a PHY reset if needed
1882 * @phydev: target phy_device struct
1884 * Description: Some PHYs are known to need a reset after their refclk was
1885 * enabled. This function evaluates the flags and perform the reset if it's
1886 * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy
1889 int phy_reset_after_clk_enable(struct phy_device *phydev)
1891 if (!phydev || !phydev->drv)
1894 if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) {
1895 phy_device_reset(phydev, 1);
1896 phy_device_reset(phydev, 0);
1902 EXPORT_SYMBOL(phy_reset_after_clk_enable);
1904 /* Generic PHY support and helper functions */
1907 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
1908 * @phydev: target phy_device struct
1910 * Description: Writes MII_ADVERTISE with the appropriate values,
1911 * after sanitizing the values to make sure we only advertise
1912 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1913 * hasn't changed, and > 0 if it has changed.
1915 static int genphy_config_advert(struct phy_device *phydev)
1917 int err, bmsr, changed = 0;
1920 /* Only allow advertising what this PHY supports */
1921 linkmode_and(phydev->advertising, phydev->advertising,
1924 adv = linkmode_adv_to_mii_adv_t(phydev->advertising);
1926 /* Setup standard advertisement */
1927 err = phy_modify_changed(phydev, MII_ADVERTISE,
1928 ADVERTISE_ALL | ADVERTISE_100BASE4 |
1929 ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM,
1936 bmsr = phy_read(phydev, MII_BMSR);
1940 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
1941 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
1944 if (!(bmsr & BMSR_ESTATEN))
1947 adv = linkmode_adv_to_mii_ctrl1000_t(phydev->advertising);
1949 err = phy_modify_changed(phydev, MII_CTRL1000,
1950 ADVERTISE_1000FULL | ADVERTISE_1000HALF,
1961 * genphy_c37_config_advert - sanitize and advertise auto-negotiation parameters
1962 * @phydev: target phy_device struct
1964 * Description: Writes MII_ADVERTISE with the appropriate values,
1965 * after sanitizing the values to make sure we only advertise
1966 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1967 * hasn't changed, and > 0 if it has changed. This function is intended
1968 * for Clause 37 1000Base-X mode.
1970 static int genphy_c37_config_advert(struct phy_device *phydev)
1974 /* Only allow advertising what this PHY supports */
1975 linkmode_and(phydev->advertising, phydev->advertising,
1978 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
1979 phydev->advertising))
1980 adv |= ADVERTISE_1000XFULL;
1981 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
1982 phydev->advertising))
1983 adv |= ADVERTISE_1000XPAUSE;
1984 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
1985 phydev->advertising))
1986 adv |= ADVERTISE_1000XPSE_ASYM;
1988 return phy_modify_changed(phydev, MII_ADVERTISE,
1989 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE |
1990 ADVERTISE_1000XHALF | ADVERTISE_1000XPSE_ASYM,
1995 * genphy_config_eee_advert - disable unwanted eee mode advertisement
1996 * @phydev: target phy_device struct
1998 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy
1999 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't
2000 * changed, and 1 if it has changed.
2002 int genphy_config_eee_advert(struct phy_device *phydev)
2006 /* Nothing to disable */
2007 if (!phydev->eee_broken_modes)
2010 err = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV,
2011 phydev->eee_broken_modes, 0);
2012 /* If the call failed, we assume that EEE is not supported */
2013 return err < 0 ? 0 : err;
2015 EXPORT_SYMBOL(genphy_config_eee_advert);
2018 * genphy_setup_forced - configures/forces speed/duplex from @phydev
2019 * @phydev: target phy_device struct
2021 * Description: Configures MII_BMCR to force speed/duplex
2022 * to the values in phydev. Assumes that the values are valid.
2023 * Please see phy_sanitize_settings().
2025 int genphy_setup_forced(struct phy_device *phydev)
2030 phydev->asym_pause = 0;
2032 if (SPEED_1000 == phydev->speed)
2033 ctl |= BMCR_SPEED1000;
2034 else if (SPEED_100 == phydev->speed)
2035 ctl |= BMCR_SPEED100;
2037 if (DUPLEX_FULL == phydev->duplex)
2038 ctl |= BMCR_FULLDPLX;
2040 return phy_modify(phydev, MII_BMCR,
2041 ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl);
2043 EXPORT_SYMBOL(genphy_setup_forced);
2045 static int genphy_setup_master_slave(struct phy_device *phydev)
2049 if (!phydev->is_gigabit_capable)
2052 switch (phydev->master_slave_set) {
2053 case MASTER_SLAVE_CFG_MASTER_PREFERRED:
2054 ctl |= CTL1000_PREFER_MASTER;
2056 case MASTER_SLAVE_CFG_SLAVE_PREFERRED:
2058 case MASTER_SLAVE_CFG_MASTER_FORCE:
2059 ctl |= CTL1000_AS_MASTER;
2061 case MASTER_SLAVE_CFG_SLAVE_FORCE:
2062 ctl |= CTL1000_ENABLE_MASTER;
2064 case MASTER_SLAVE_CFG_UNKNOWN:
2065 case MASTER_SLAVE_CFG_UNSUPPORTED:
2068 phydev_warn(phydev, "Unsupported Master/Slave mode\n");
2072 return phy_modify_changed(phydev, MII_CTRL1000,
2073 (CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER |
2074 CTL1000_PREFER_MASTER), ctl);
2077 int genphy_read_master_slave(struct phy_device *phydev)
2082 phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN;
2083 phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN;
2085 val = phy_read(phydev, MII_CTRL1000);
2089 if (val & CTL1000_ENABLE_MASTER) {
2090 if (val & CTL1000_AS_MASTER)
2091 cfg = MASTER_SLAVE_CFG_MASTER_FORCE;
2093 cfg = MASTER_SLAVE_CFG_SLAVE_FORCE;
2095 if (val & CTL1000_PREFER_MASTER)
2096 cfg = MASTER_SLAVE_CFG_MASTER_PREFERRED;
2098 cfg = MASTER_SLAVE_CFG_SLAVE_PREFERRED;
2101 val = phy_read(phydev, MII_STAT1000);
2105 if (val & LPA_1000MSFAIL) {
2106 state = MASTER_SLAVE_STATE_ERR;
2107 } else if (phydev->link) {
2108 /* this bits are valid only for active link */
2109 if (val & LPA_1000MSRES)
2110 state = MASTER_SLAVE_STATE_MASTER;
2112 state = MASTER_SLAVE_STATE_SLAVE;
2114 state = MASTER_SLAVE_STATE_UNKNOWN;
2117 phydev->master_slave_get = cfg;
2118 phydev->master_slave_state = state;
2122 EXPORT_SYMBOL(genphy_read_master_slave);
2125 * genphy_restart_aneg - Enable and Restart Autonegotiation
2126 * @phydev: target phy_device struct
2128 int genphy_restart_aneg(struct phy_device *phydev)
2130 /* Don't isolate the PHY if we're negotiating */
2131 return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE,
2132 BMCR_ANENABLE | BMCR_ANRESTART);
2134 EXPORT_SYMBOL(genphy_restart_aneg);
2137 * genphy_check_and_restart_aneg - Enable and restart auto-negotiation
2138 * @phydev: target phy_device struct
2139 * @restart: whether aneg restart is requested
2141 * Check, and restart auto-negotiation if needed.
2143 int genphy_check_and_restart_aneg(struct phy_device *phydev, bool restart)
2148 /* Advertisement hasn't changed, but maybe aneg was never on to
2149 * begin with? Or maybe phy was isolated?
2151 ret = phy_read(phydev, MII_BMCR);
2155 if (!(ret & BMCR_ANENABLE) || (ret & BMCR_ISOLATE))
2160 return genphy_restart_aneg(phydev);
2164 EXPORT_SYMBOL(genphy_check_and_restart_aneg);
2167 * __genphy_config_aneg - restart auto-negotiation or write BMCR
2168 * @phydev: target phy_device struct
2169 * @changed: whether autoneg is requested
2171 * Description: If auto-negotiation is enabled, we configure the
2172 * advertising, and then restart auto-negotiation. If it is not
2173 * enabled, then we write the BMCR.
2175 int __genphy_config_aneg(struct phy_device *phydev, bool changed)
2179 if (genphy_config_eee_advert(phydev))
2182 err = genphy_setup_master_slave(phydev);
2188 if (AUTONEG_ENABLE != phydev->autoneg)
2189 return genphy_setup_forced(phydev);
2191 err = genphy_config_advert(phydev);
2192 if (err < 0) /* error */
2197 return genphy_check_and_restart_aneg(phydev, changed);
2199 EXPORT_SYMBOL(__genphy_config_aneg);
2202 * genphy_c37_config_aneg - restart auto-negotiation or write BMCR
2203 * @phydev: target phy_device struct
2205 * Description: If auto-negotiation is enabled, we configure the
2206 * advertising, and then restart auto-negotiation. If it is not
2207 * enabled, then we write the BMCR. This function is intended
2208 * for use with Clause 37 1000Base-X mode.
2210 int genphy_c37_config_aneg(struct phy_device *phydev)
2214 if (phydev->autoneg != AUTONEG_ENABLE)
2215 return genphy_setup_forced(phydev);
2217 err = phy_modify(phydev, MII_BMCR, BMCR_SPEED1000 | BMCR_SPEED100,
2222 changed = genphy_c37_config_advert(phydev);
2223 if (changed < 0) /* error */
2227 /* Advertisement hasn't changed, but maybe aneg was never on to
2228 * begin with? Or maybe phy was isolated?
2230 int ctl = phy_read(phydev, MII_BMCR);
2235 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
2236 changed = 1; /* do restart aneg */
2239 /* Only restart aneg if we are advertising something different
2240 * than we were before.
2243 return genphy_restart_aneg(phydev);
2247 EXPORT_SYMBOL(genphy_c37_config_aneg);
2250 * genphy_aneg_done - return auto-negotiation status
2251 * @phydev: target phy_device struct
2253 * Description: Reads the status register and returns 0 either if
2254 * auto-negotiation is incomplete, or if there was an error.
2255 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
2257 int genphy_aneg_done(struct phy_device *phydev)
2259 int retval = phy_read(phydev, MII_BMSR);
2261 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
2263 EXPORT_SYMBOL(genphy_aneg_done);
2266 * genphy_update_link - update link status in @phydev
2267 * @phydev: target phy_device struct
2269 * Description: Update the value in phydev->link to reflect the
2270 * current link value. In order to do this, we need to read
2271 * the status register twice, keeping the second value.
2273 int genphy_update_link(struct phy_device *phydev)
2275 int status = 0, bmcr;
2277 bmcr = phy_read(phydev, MII_BMCR);
2281 /* Autoneg is being started, therefore disregard BMSR value and
2282 * report link as down.
2284 if (bmcr & BMCR_ANRESTART)
2287 /* The link state is latched low so that momentary link
2288 * drops can be detected. Do not double-read the status
2289 * in polling mode to detect such short link drops except
2290 * the link was already down.
2292 if (!phy_polling_mode(phydev) || !phydev->link) {
2293 status = phy_read(phydev, MII_BMSR);
2296 else if (status & BMSR_LSTATUS)
2300 /* Read link and autonegotiation status */
2301 status = phy_read(phydev, MII_BMSR);
2305 phydev->link = status & BMSR_LSTATUS ? 1 : 0;
2306 phydev->autoneg_complete = status & BMSR_ANEGCOMPLETE ? 1 : 0;
2308 /* Consider the case that autoneg was started and "aneg complete"
2309 * bit has been reset, but "link up" bit not yet.
2311 if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete)
2316 EXPORT_SYMBOL(genphy_update_link);
2318 int genphy_read_lpa(struct phy_device *phydev)
2322 if (phydev->autoneg == AUTONEG_ENABLE) {
2323 if (!phydev->autoneg_complete) {
2324 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
2326 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, 0);
2330 if (phydev->is_gigabit_capable) {
2331 lpagb = phy_read(phydev, MII_STAT1000);
2335 if (lpagb & LPA_1000MSFAIL) {
2336 int adv = phy_read(phydev, MII_CTRL1000);
2341 if (adv & CTL1000_ENABLE_MASTER)
2342 phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n");
2344 phydev_err(phydev, "Master/Slave resolution failed\n");
2348 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
2352 lpa = phy_read(phydev, MII_LPA);
2356 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, lpa);
2358 linkmode_zero(phydev->lp_advertising);
2363 EXPORT_SYMBOL(genphy_read_lpa);
2366 * genphy_read_status_fixed - read the link parameters for !aneg mode
2367 * @phydev: target phy_device struct
2369 * Read the current duplex and speed state for a PHY operating with
2370 * autonegotiation disabled.
2372 int genphy_read_status_fixed(struct phy_device *phydev)
2374 int bmcr = phy_read(phydev, MII_BMCR);
2379 if (bmcr & BMCR_FULLDPLX)
2380 phydev->duplex = DUPLEX_FULL;
2382 phydev->duplex = DUPLEX_HALF;
2384 if (bmcr & BMCR_SPEED1000)
2385 phydev->speed = SPEED_1000;
2386 else if (bmcr & BMCR_SPEED100)
2387 phydev->speed = SPEED_100;
2389 phydev->speed = SPEED_10;
2393 EXPORT_SYMBOL(genphy_read_status_fixed);
2396 * genphy_read_status - check the link status and update current link state
2397 * @phydev: target phy_device struct
2399 * Description: Check the link, then figure out the current state
2400 * by comparing what we advertise with what the link partner
2401 * advertises. Start by checking the gigabit possibilities,
2402 * then move on to 10/100.
2404 int genphy_read_status(struct phy_device *phydev)
2406 int err, old_link = phydev->link;
2408 /* Update the link, but return if there was an error */
2409 err = genphy_update_link(phydev);
2413 /* why bother the PHY if nothing can have changed */
2414 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
2417 phydev->master_slave_get = MASTER_SLAVE_CFG_UNSUPPORTED;
2418 phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
2419 phydev->speed = SPEED_UNKNOWN;
2420 phydev->duplex = DUPLEX_UNKNOWN;
2422 phydev->asym_pause = 0;
2424 if (phydev->is_gigabit_capable) {
2425 err = genphy_read_master_slave(phydev);
2430 err = genphy_read_lpa(phydev);
2434 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
2435 phy_resolve_aneg_linkmode(phydev);
2436 } else if (phydev->autoneg == AUTONEG_DISABLE) {
2437 err = genphy_read_status_fixed(phydev);
2444 EXPORT_SYMBOL(genphy_read_status);
2447 * genphy_c37_read_status - check the link status and update current link state
2448 * @phydev: target phy_device struct
2450 * Description: Check the link, then figure out the current state
2451 * by comparing what we advertise with what the link partner
2452 * advertises. This function is for Clause 37 1000Base-X mode.
2454 int genphy_c37_read_status(struct phy_device *phydev)
2456 int lpa, err, old_link = phydev->link;
2458 /* Update the link, but return if there was an error */
2459 err = genphy_update_link(phydev);
2463 /* why bother the PHY if nothing can have changed */
2464 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
2467 phydev->duplex = DUPLEX_UNKNOWN;
2469 phydev->asym_pause = 0;
2471 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
2472 lpa = phy_read(phydev, MII_LPA);
2476 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
2477 phydev->lp_advertising, lpa & LPA_LPACK);
2478 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2479 phydev->lp_advertising, lpa & LPA_1000XFULL);
2480 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2481 phydev->lp_advertising, lpa & LPA_1000XPAUSE);
2482 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2483 phydev->lp_advertising,
2484 lpa & LPA_1000XPAUSE_ASYM);
2486 phy_resolve_aneg_linkmode(phydev);
2487 } else if (phydev->autoneg == AUTONEG_DISABLE) {
2488 int bmcr = phy_read(phydev, MII_BMCR);
2493 if (bmcr & BMCR_FULLDPLX)
2494 phydev->duplex = DUPLEX_FULL;
2496 phydev->duplex = DUPLEX_HALF;
2501 EXPORT_SYMBOL(genphy_c37_read_status);
2504 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
2505 * @phydev: target phy_device struct
2507 * Description: Perform a software PHY reset using the standard
2508 * BMCR_RESET bit and poll for the reset bit to be cleared.
2510 * Returns: 0 on success, < 0 on failure
2512 int genphy_soft_reset(struct phy_device *phydev)
2514 u16 res = BMCR_RESET;
2517 if (phydev->autoneg == AUTONEG_ENABLE)
2518 res |= BMCR_ANRESTART;
2520 ret = phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, res);
2524 /* Clause 22 states that setting bit BMCR_RESET sets control registers
2525 * to their default value. Therefore the POWER DOWN bit is supposed to
2526 * be cleared after soft reset.
2528 phydev->suspended = 0;
2530 ret = phy_poll_reset(phydev);
2534 /* BMCR may be reset to defaults */
2535 if (phydev->autoneg == AUTONEG_DISABLE)
2536 ret = genphy_setup_forced(phydev);
2540 EXPORT_SYMBOL(genphy_soft_reset);
2542 irqreturn_t genphy_handle_interrupt_no_ack(struct phy_device *phydev)
2544 /* It seems there are cases where the interrupts are handled by another
2545 * entity (ie an IRQ controller embedded inside the PHY) and do not
2546 * need any other interraction from phylib. In this case, just trigger
2547 * the state machine directly.
2549 phy_trigger_machine(phydev);
2553 EXPORT_SYMBOL(genphy_handle_interrupt_no_ack);
2556 * genphy_read_abilities - read PHY abilities from Clause 22 registers
2557 * @phydev: target phy_device struct
2559 * Description: Reads the PHY's abilities and populates
2560 * phydev->supported accordingly.
2562 * Returns: 0 on success, < 0 on failure
2564 int genphy_read_abilities(struct phy_device *phydev)
2568 linkmode_set_bit_array(phy_basic_ports_array,
2569 ARRAY_SIZE(phy_basic_ports_array),
2572 val = phy_read(phydev, MII_BMSR);
2576 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported,
2577 val & BMSR_ANEGCAPABLE);
2579 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, phydev->supported,
2580 val & BMSR_100FULL);
2581 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported,
2582 val & BMSR_100HALF);
2583 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, phydev->supported,
2585 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, phydev->supported,
2588 if (val & BMSR_ESTATEN) {
2589 val = phy_read(phydev, MII_ESTATUS);
2593 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
2594 phydev->supported, val & ESTATUS_1000_TFULL);
2595 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
2596 phydev->supported, val & ESTATUS_1000_THALF);
2597 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2598 phydev->supported, val & ESTATUS_1000_XFULL);
2603 EXPORT_SYMBOL(genphy_read_abilities);
2605 /* This is used for the phy device which doesn't support the MMD extended
2606 * register access, but it does have side effect when we are trying to access
2607 * the MMD register via indirect method.
2609 int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum)
2613 EXPORT_SYMBOL(genphy_read_mmd_unsupported);
2615 int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum,
2616 u16 regnum, u16 val)
2620 EXPORT_SYMBOL(genphy_write_mmd_unsupported);
2622 int genphy_suspend(struct phy_device *phydev)
2624 return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN);
2626 EXPORT_SYMBOL(genphy_suspend);
2628 int genphy_resume(struct phy_device *phydev)
2630 return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN);
2632 EXPORT_SYMBOL(genphy_resume);
2634 int genphy_loopback(struct phy_device *phydev, bool enable)
2637 u16 val, ctl = BMCR_LOOPBACK;
2640 if (phydev->speed == SPEED_1000)
2641 ctl |= BMCR_SPEED1000;
2642 else if (phydev->speed == SPEED_100)
2643 ctl |= BMCR_SPEED100;
2645 if (phydev->duplex == DUPLEX_FULL)
2646 ctl |= BMCR_FULLDPLX;
2648 phy_modify(phydev, MII_BMCR, ~0, ctl);
2650 ret = phy_read_poll_timeout(phydev, MII_BMSR, val,
2652 5000, 500000, true);
2656 phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK, 0);
2658 phy_config_aneg(phydev);
2663 EXPORT_SYMBOL(genphy_loopback);
2666 * phy_remove_link_mode - Remove a supported link mode
2667 * @phydev: phy_device structure to remove link mode from
2668 * @link_mode: Link mode to be removed
2670 * Description: Some MACs don't support all link modes which the PHY
2671 * does. e.g. a 1G MAC often does not support 1000Half. Add a helper
2672 * to remove a link mode.
2674 void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode)
2676 linkmode_clear_bit(link_mode, phydev->supported);
2677 phy_advertise_supported(phydev);
2679 EXPORT_SYMBOL(phy_remove_link_mode);
2681 static void phy_copy_pause_bits(unsigned long *dst, unsigned long *src)
2683 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, dst,
2684 linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, src));
2685 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, dst,
2686 linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, src));
2690 * phy_advertise_supported - Advertise all supported modes
2691 * @phydev: target phy_device struct
2693 * Description: Called to advertise all supported modes, doesn't touch
2694 * pause mode advertising.
2696 void phy_advertise_supported(struct phy_device *phydev)
2698 __ETHTOOL_DECLARE_LINK_MODE_MASK(new);
2700 linkmode_copy(new, phydev->supported);
2701 phy_copy_pause_bits(new, phydev->advertising);
2702 linkmode_copy(phydev->advertising, new);
2704 EXPORT_SYMBOL(phy_advertise_supported);
2707 * phy_support_sym_pause - Enable support of symmetrical pause
2708 * @phydev: target phy_device struct
2710 * Description: Called by the MAC to indicate is supports symmetrical
2711 * Pause, but not asym pause.
2713 void phy_support_sym_pause(struct phy_device *phydev)
2715 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported);
2716 phy_copy_pause_bits(phydev->advertising, phydev->supported);
2718 EXPORT_SYMBOL(phy_support_sym_pause);
2721 * phy_support_asym_pause - Enable support of asym pause
2722 * @phydev: target phy_device struct
2724 * Description: Called by the MAC to indicate is supports Asym Pause.
2726 void phy_support_asym_pause(struct phy_device *phydev)
2728 phy_copy_pause_bits(phydev->advertising, phydev->supported);
2730 EXPORT_SYMBOL(phy_support_asym_pause);
2733 * phy_set_sym_pause - Configure symmetric Pause
2734 * @phydev: target phy_device struct
2735 * @rx: Receiver Pause is supported
2736 * @tx: Transmit Pause is supported
2737 * @autoneg: Auto neg should be used
2739 * Description: Configure advertised Pause support depending on if
2740 * receiver pause and pause auto neg is supported. Generally called
2741 * from the set_pauseparam .ndo.
2743 void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx,
2746 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported);
2748 if (rx && tx && autoneg)
2749 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2752 linkmode_copy(phydev->advertising, phydev->supported);
2754 EXPORT_SYMBOL(phy_set_sym_pause);
2757 * phy_set_asym_pause - Configure Pause and Asym Pause
2758 * @phydev: target phy_device struct
2759 * @rx: Receiver Pause is supported
2760 * @tx: Transmit Pause is supported
2762 * Description: Configure advertised Pause support depending on if
2763 * transmit and receiver pause is supported. If there has been a
2764 * change in adverting, trigger a new autoneg. Generally called from
2765 * the set_pauseparam .ndo.
2767 void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx)
2769 __ETHTOOL_DECLARE_LINK_MODE_MASK(oldadv);
2771 linkmode_copy(oldadv, phydev->advertising);
2772 linkmode_set_pause(phydev->advertising, tx, rx);
2774 if (!linkmode_equal(oldadv, phydev->advertising) &&
2776 phy_start_aneg(phydev);
2778 EXPORT_SYMBOL(phy_set_asym_pause);
2781 * phy_validate_pause - Test if the PHY/MAC support the pause configuration
2782 * @phydev: phy_device struct
2783 * @pp: requested pause configuration
2785 * Description: Test if the PHY/MAC combination supports the Pause
2786 * configuration the user is requesting. Returns True if it is
2787 * supported, false otherwise.
2789 bool phy_validate_pause(struct phy_device *phydev,
2790 struct ethtool_pauseparam *pp)
2792 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2793 phydev->supported) && pp->rx_pause)
2796 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2797 phydev->supported) &&
2798 pp->rx_pause != pp->tx_pause)
2803 EXPORT_SYMBOL(phy_validate_pause);
2806 * phy_get_pause - resolve negotiated pause modes
2807 * @phydev: phy_device struct
2808 * @tx_pause: pointer to bool to indicate whether transmit pause should be
2810 * @rx_pause: pointer to bool to indicate whether receive pause should be
2813 * Resolve and return the flow control modes according to the negotiation
2814 * result. This includes checking that we are operating in full duplex mode.
2815 * See linkmode_resolve_pause() for further details.
2817 void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause)
2819 if (phydev->duplex != DUPLEX_FULL) {
2825 return linkmode_resolve_pause(phydev->advertising,
2826 phydev->lp_advertising,
2827 tx_pause, rx_pause);
2829 EXPORT_SYMBOL(phy_get_pause);
2831 #if IS_ENABLED(CONFIG_OF_MDIO)
2832 static int phy_get_int_delay_property(struct device *dev, const char *name)
2837 ret = device_property_read_u32(dev, name, &int_delay);
2844 static int phy_get_int_delay_property(struct device *dev, const char *name)
2851 * phy_get_internal_delay - returns the index of the internal delay
2852 * @phydev: phy_device struct
2853 * @dev: pointer to the devices device struct
2854 * @delay_values: array of delays the PHY supports
2855 * @size: the size of the delay array
2856 * @is_rx: boolean to indicate to get the rx internal delay
2858 * Returns the index within the array of internal delay passed in.
2859 * If the device property is not present then the interface type is checked
2860 * if the interface defines use of internal delay then a 1 is returned otherwise
2862 * The array must be in ascending order. If PHY does not have an ascending order
2863 * array then size = 0 and the value of the delay property is returned.
2864 * Return -EINVAL if the delay is invalid or cannot be found.
2866 s32 phy_get_internal_delay(struct phy_device *phydev, struct device *dev,
2867 const int *delay_values, int size, bool is_rx)
2873 delay = phy_get_int_delay_property(dev, "rx-internal-delay-ps");
2874 if (delay < 0 && size == 0) {
2875 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
2876 phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
2883 delay = phy_get_int_delay_property(dev, "tx-internal-delay-ps");
2884 if (delay < 0 && size == 0) {
2885 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
2886 phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
2896 if (delay && size == 0)
2899 if (delay < delay_values[0] || delay > delay_values[size - 1]) {
2900 phydev_err(phydev, "Delay %d is out of range\n", delay);
2904 if (delay == delay_values[0])
2907 for (i = 1; i < size; i++) {
2908 if (delay == delay_values[i])
2911 /* Find an approximate index by looking up the table */
2912 if (delay > delay_values[i - 1] &&
2913 delay < delay_values[i]) {
2914 if (delay - delay_values[i - 1] <
2915 delay_values[i] - delay)
2922 phydev_err(phydev, "error finding internal delay index for %d\n",
2927 EXPORT_SYMBOL(phy_get_internal_delay);
2929 static bool phy_drv_supports_irq(struct phy_driver *phydrv)
2931 return phydrv->config_intr && phydrv->handle_interrupt;
2935 * fwnode_mdio_find_device - Given a fwnode, find the mdio_device
2936 * @fwnode: pointer to the mdio_device's fwnode
2938 * If successful, returns a pointer to the mdio_device with the embedded
2939 * struct device refcount incremented by one, or NULL on failure.
2940 * The caller should call put_device() on the mdio_device after its use.
2942 struct mdio_device *fwnode_mdio_find_device(struct fwnode_handle *fwnode)
2949 d = bus_find_device_by_fwnode(&mdio_bus_type, fwnode);
2953 return to_mdio_device(d);
2955 EXPORT_SYMBOL(fwnode_mdio_find_device);
2958 * fwnode_phy_find_device - For provided phy_fwnode, find phy_device.
2960 * @phy_fwnode: Pointer to the phy's fwnode.
2962 * If successful, returns a pointer to the phy_device with the embedded
2963 * struct device refcount incremented by one, or NULL on failure.
2965 struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode)
2967 struct mdio_device *mdiodev;
2969 mdiodev = fwnode_mdio_find_device(phy_fwnode);
2973 if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY)
2974 return to_phy_device(&mdiodev->dev);
2976 put_device(&mdiodev->dev);
2980 EXPORT_SYMBOL(fwnode_phy_find_device);
2983 * device_phy_find_device - For the given device, get the phy_device
2984 * @dev: Pointer to the given device
2986 * Refer return conditions of fwnode_phy_find_device().
2988 struct phy_device *device_phy_find_device(struct device *dev)
2990 return fwnode_phy_find_device(dev_fwnode(dev));
2992 EXPORT_SYMBOL_GPL(device_phy_find_device);
2995 * fwnode_get_phy_node - Get the phy_node using the named reference.
2996 * @fwnode: Pointer to fwnode from which phy_node has to be obtained.
2998 * Refer return conditions of fwnode_find_reference().
2999 * For ACPI, only "phy-handle" is supported. Legacy DT properties "phy"
3000 * and "phy-device" are not supported in ACPI. DT supports all the three
3001 * named references to the phy node.
3003 struct fwnode_handle *fwnode_get_phy_node(struct fwnode_handle *fwnode)
3005 struct fwnode_handle *phy_node;
3007 /* Only phy-handle is used for ACPI */
3008 phy_node = fwnode_find_reference(fwnode, "phy-handle", 0);
3009 if (is_acpi_node(fwnode) || !IS_ERR(phy_node))
3011 phy_node = fwnode_find_reference(fwnode, "phy", 0);
3012 if (IS_ERR(phy_node))
3013 phy_node = fwnode_find_reference(fwnode, "phy-device", 0);
3016 EXPORT_SYMBOL_GPL(fwnode_get_phy_node);
3019 * phy_probe - probe and init a PHY device
3020 * @dev: device to probe and init
3022 * Description: Take care of setting up the phy_device structure,
3023 * set the state to READY (the driver's init function should
3024 * set it to STARTING if needed).
3026 static int phy_probe(struct device *dev)
3028 struct phy_device *phydev = to_phy_device(dev);
3029 struct device_driver *drv = phydev->mdio.dev.driver;
3030 struct phy_driver *phydrv = to_phy_driver(drv);
3033 phydev->drv = phydrv;
3035 /* Disable the interrupt if the PHY doesn't support it
3036 * but the interrupt is still a valid one
3038 if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev))
3039 phydev->irq = PHY_POLL;
3041 if (phydrv->flags & PHY_IS_INTERNAL)
3042 phydev->is_internal = true;
3044 mutex_lock(&phydev->lock);
3046 /* Deassert the reset signal */
3047 phy_device_reset(phydev, 0);
3049 if (phydev->drv->probe) {
3050 err = phydev->drv->probe(phydev);
3055 /* Start out supporting everything. Eventually,
3056 * a controller will attach, and may modify one
3057 * or both of these values
3059 if (phydrv->features)
3060 linkmode_copy(phydev->supported, phydrv->features);
3061 else if (phydrv->get_features)
3062 err = phydrv->get_features(phydev);
3063 else if (phydev->is_c45)
3064 err = genphy_c45_pma_read_abilities(phydev);
3066 err = genphy_read_abilities(phydev);
3071 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
3073 phydev->autoneg = 0;
3075 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
3077 phydev->is_gigabit_capable = 1;
3078 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
3080 phydev->is_gigabit_capable = 1;
3082 of_set_phy_supported(phydev);
3083 phy_advertise_supported(phydev);
3085 /* Get the EEE modes we want to prohibit. We will ask
3086 * the PHY stop advertising these mode later on
3088 of_set_phy_eee_broken(phydev);
3090 /* The Pause Frame bits indicate that the PHY can support passing
3091 * pause frames. During autonegotiation, the PHYs will determine if
3092 * they should allow pause frames to pass. The MAC driver should then
3093 * use that result to determine whether to enable flow control via
3096 * Normally, PHY drivers should not set the Pause bits, and instead
3097 * allow phylib to do that. However, there may be some situations
3098 * (e.g. hardware erratum) where the driver wants to set only one
3101 if (!test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported) &&
3102 !test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported)) {
3103 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
3105 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
3109 /* Set the state to READY by default */
3110 phydev->state = PHY_READY;
3113 /* Assert the reset signal */
3115 phy_device_reset(phydev, 1);
3117 mutex_unlock(&phydev->lock);
3122 static int phy_remove(struct device *dev)
3124 struct phy_device *phydev = to_phy_device(dev);
3126 cancel_delayed_work_sync(&phydev->state_queue);
3128 mutex_lock(&phydev->lock);
3129 phydev->state = PHY_DOWN;
3130 mutex_unlock(&phydev->lock);
3132 sfp_bus_del_upstream(phydev->sfp_bus);
3133 phydev->sfp_bus = NULL;
3135 if (phydev->drv && phydev->drv->remove)
3136 phydev->drv->remove(phydev);
3138 /* Assert the reset signal */
3139 phy_device_reset(phydev, 1);
3146 static void phy_shutdown(struct device *dev)
3148 struct phy_device *phydev = to_phy_device(dev);
3150 if (phydev->state == PHY_READY || !phydev->attached_dev)
3153 phy_disable_interrupts(phydev);
3157 * phy_driver_register - register a phy_driver with the PHY layer
3158 * @new_driver: new phy_driver to register
3159 * @owner: module owning this PHY
3161 int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
3165 /* Either the features are hard coded, or dynamically
3166 * determined. It cannot be both.
3168 if (WARN_ON(new_driver->features && new_driver->get_features)) {
3169 pr_err("%s: features and get_features must not both be set\n",
3174 /* PHYLIB device drivers must not match using a DT compatible table
3175 * as this bypasses our checks that the mdiodev that is being matched
3176 * is backed by a struct phy_device. If such a case happens, we will
3177 * make out-of-bounds accesses and lockup in phydev->lock.
3179 if (WARN(new_driver->mdiodrv.driver.of_match_table,
3180 "%s: driver must not provide a DT match table\n",
3184 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY;
3185 new_driver->mdiodrv.driver.name = new_driver->name;
3186 new_driver->mdiodrv.driver.bus = &mdio_bus_type;
3187 new_driver->mdiodrv.driver.probe = phy_probe;
3188 new_driver->mdiodrv.driver.remove = phy_remove;
3189 new_driver->mdiodrv.driver.shutdown = phy_shutdown;
3190 new_driver->mdiodrv.driver.owner = owner;
3191 new_driver->mdiodrv.driver.probe_type = PROBE_FORCE_SYNCHRONOUS;
3193 retval = driver_register(&new_driver->mdiodrv.driver);
3195 pr_err("%s: Error %d in registering driver\n",
3196 new_driver->name, retval);
3201 pr_debug("%s: Registered new driver\n", new_driver->name);
3205 EXPORT_SYMBOL(phy_driver_register);
3207 int phy_drivers_register(struct phy_driver *new_driver, int n,
3208 struct module *owner)
3212 for (i = 0; i < n; i++) {
3213 ret = phy_driver_register(new_driver + i, owner);
3216 phy_driver_unregister(new_driver + i);
3222 EXPORT_SYMBOL(phy_drivers_register);
3224 void phy_driver_unregister(struct phy_driver *drv)
3226 driver_unregister(&drv->mdiodrv.driver);
3228 EXPORT_SYMBOL(phy_driver_unregister);
3230 void phy_drivers_unregister(struct phy_driver *drv, int n)
3234 for (i = 0; i < n; i++)
3235 phy_driver_unregister(drv + i);
3237 EXPORT_SYMBOL(phy_drivers_unregister);
3239 static struct phy_driver genphy_driver = {
3240 .phy_id = 0xffffffff,
3241 .phy_id_mask = 0xffffffff,
3242 .name = "Generic PHY",
3243 .get_features = genphy_read_abilities,
3244 .suspend = genphy_suspend,
3245 .resume = genphy_resume,
3246 .set_loopback = genphy_loopback,
3249 static const struct ethtool_phy_ops phy_ethtool_phy_ops = {
3250 .get_sset_count = phy_ethtool_get_sset_count,
3251 .get_strings = phy_ethtool_get_strings,
3252 .get_stats = phy_ethtool_get_stats,
3253 .start_cable_test = phy_start_cable_test,
3254 .start_cable_test_tdr = phy_start_cable_test_tdr,
3257 static int __init phy_init(void)
3261 rc = mdio_bus_init();
3265 ethtool_set_ethtool_phy_ops(&phy_ethtool_phy_ops);
3268 rc = phy_driver_register(&genphy_c45_driver, THIS_MODULE);
3272 rc = phy_driver_register(&genphy_driver, THIS_MODULE);
3274 phy_driver_unregister(&genphy_c45_driver);
3282 static void __exit phy_exit(void)
3284 phy_driver_unregister(&genphy_c45_driver);
3285 phy_driver_unregister(&genphy_driver);
3287 ethtool_set_ethtool_phy_ops(NULL);
3290 subsys_initcall(phy_init);
3291 module_exit(phy_exit);